Drawing-machine for tubes, rods, &amp;c.



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APPLICATION FILED JULY l INC. 766.291,

Patented August FE1.

SFEULEICTEON fortuin@ mit of Letters Patent No. ''i..ji, dated .e l

l. Slll'lll, 0F ROME,

Application tiled July l.7,1903. 5 `in l No. 165,915. (llo mitici.)

uresol' reference niai'led thereon. which forni e part ofthisspeci-ticaition.

The object of nl v invention to provide en. improved drfuving-nnnhinefor tubes, rods, 626 which compact` effective in drawing' :nidreturning. and adapted to convenicntzuul expeditious manipulation. Withreicrencc to the :nini-hinclicino compact it nil-i3' he Suid. i zichineof this class draws the unimi-nil through the di@ :is

that thc ordinary fh wing the piston or plunger niore :iwny from thcdie. and taking into consideration the length of the cylinder, the necnr); splice hot-Ween the die tand cyliin er, and the ncessuiy space ifront of the di 1o introduce the material n muchincs are r3' lf andciu'iilicrsonic and require lling., :unc-Ln 1 f hoor-space :uid it largoamount of travel liv the operators. As to licing'convcnicnt andexpeditious to manipulate, it maybe said that ordinarily in machines ofthis class no provision is mode for introducing the material withfacility or removing it with facility, :whereby the output of themachines is very niuch limited.

ln the drawingmFigure 1 shows a plan View of a drawing-machine of myimproved construction, parts being broken out to shorten the ligure.Fig. 2 is a partial side elevation and u partial vertical section, thesection'heing taken on line A B of Fig. l. Fig. 3 is a cross-sectiontaken on line C D of Fig. l. l is an end vic seen from lche dleftlil-.incl of 2. Fi o :in a shows attachments which muy he 1 ded for themachine. l ring to the i cnccl-tig-zures in more indicates the frame',

1. i' i J and L rigidly Secure@ t rito, and, iu fact. constitute z.portion of lv c foune.

'which constitutes :i guide or l the draw-heini 's such Mounted on theInline und sul from the inidxl le portion town rd one c: ol is thedraw-head 5. Thif; d or runs: on the izihlo portion li im); The tzthlcll is novidw'l with n. lonjfz Slot T, in which there runs :idowiiwzirajecting' cui* 5S, zittzichcd to the dm in On thex opposite und ot' thcli-:nuo from the table piu't (i there are provided the c vx'lin( l()ll). rl`hoc3'lifillers receive tho` plu "vrs ll, which are substantiallyof the Vlull dinuiclcr ol' the inte iorot' the c vllnilor. rl'x ll :ircconnccled directly to th" i .3,p1clm'alily h v the clonggzitf l 55 willoliviaito the tendency to shew.

ner end the plungcx's lll zuo prov" rollei` l which runs on the inno thecylinder and supports the wf-i plunriex's when they :we di" To cylinder.At the open en i. Y

gntwided withn stulled hox 13.

ders ero provided with a port which fluid (as water or oil) in ducedinto :md rcnoved 1 The ports ll comin/ct l which iungly-pi ne reifen; ior forcing npfuttzw :ind n; if. gate o1' vulve for controlling il;Between the body lo l() l0 there 'provincll :i Klipp' which may lioformed us n. portion of ma frame. Between the end oi' the cylindc` atowax-d the draw-head there is provlcd ai dicf holder 17, adapted tohold the dic 1S` nhl-:h is preferably removnblezind interchzino'enh'lheclraw-hend 5 is provided wit or gripping tongs consisting'. as. fwn,ci' nail* of jaws 2O 20. These jews uri ed in the draw-head by links 2i90 to the jaws and drew-head, respect.velg;` l the jaws are connected,so as to nieve l;- word and 'oxwuz'cl together, oy inc? i oi cross-pin23, secured to one and @nu through en opening in the other, :nul on 95the tzible S.

The length und arm mento? thf l jay-.w on

@the n oi-oooh the drawinc die very cli' end ol thc laznne there '30 ismovable longitudinal oi' the irame in the' guides 33, and it is adjustedby means 40i: a screw 34, extending through ,an ear in the slide andengaging in a nut in the frame.

For returning the draw-head to starting position there is provided ablock-and-taclrleconstruction consisting of the large grocved wheel 40and the smaller grooved Wheel 41, mounted in ixed bearings on theframe., and the movable wheel or pulley 42, mounted on a. slide 43,attached to the piston-rod 44 of the cylinder 45. A chain 46 passesaround these wheels, as shown, and is attached at one end to the lug orprojection 8 on the draw-head and at the other to the slide 43 on the'pistonrod 44. The cylinder 45 is' provided with a supply-pipe 47,supplying duid-(as water or oil) to the end of the cylinder toward theslide 43. v This pipe will be ordinarily open at all times, supplying aconstant pressure oiducingthe desired reduction.

iiuid to the piston of the cylinder 45.

The operation of the device in Drawing 1, where the interior diameter,as well as the exterior, should be taken into account, is as follows:l/Vhen the plungers are within the cylinders, the gripping-jaw 2O standsclose to the drawingdie. 18. A section of tube to be drawn, which haspreviously been been lubricated by dipping in oil or other lubricant inthe tank` 16, is inserted through the opening in the die 18, the endhaving been previously reduced for that purpose, as is common in suchpractice. The mandrel 32 is then or has been previously inserted in thetube, and the shank thereof is engaged with the holdingshoulders 31,which are adjusted so that the head oi the mandrel will occupy asuitable position with reference to the die. The jaws 20 are closed ontothe protruding end of the tube to be drawn, which is indicated by fc,and the machine is-started by opening the valve whichV controls thesupply'oi' fluid through vthe pipe 15. By reason of the jaws resting onthe table 6 and the arrangement oi the links con-I necting the jaws ortongs to the drm 7-head the tongs or jaws will automatically grip thematerialI when the draw-head starts. This luid, which is ordinarily oilor water, will be sup? plied, preferably, at a heavy pressure-that is tosay, one thousand pounds to the square inch more or less. When thepressure is supplied, the plungers 11 are Jforced out of the cylind der,moving the draw-head 5 away trom the die 18 and drawing the tube throughthe die, pro- The power ol the cylinder 10 is such that it will readilyovercome the pressure of the fluid inthe cylinder 45, which ordinarilywill be supplied at a less pressure, as from a city water-main or othersuitable source. ,ff-is the tube is drawn resaca the plunger in thecylinderl 45 is moved outwardly, forcing the contents of the cylinderout through the pipe 47. rBhe sections of pipe drawn are regulated withreference to the length of the machine, so that at the time thedraw-head has completed its travel, or previously, the section will bedrawn entirely out of the die 18. As soon as the end passes out of thedie the natural elasticity and springing parte will allow the jaws Q0 tofly to open position' and the tube is dropped on the table 6, fromwhence it is removed by the operator. oldi from the cylinders 10 10, andpipe 15, opened to the exhaust on the pressure on the cylinder 45through the block n-and tackle mechanism described, serves toimmediately return the draw-head. 'The mandrel 32 being removed, a newsection oi tube to be drawn is provided and the operation repeated.

lin automatic device 4for shutting oli the supply of fluid to thecylinder 10 and opening the exhaust for the sam'e maybe provided, iidesired. in case the machine is con-v structed for long draws it may bedesirable to support the -plungers 11 at intervals along the frame.vided arms 50, secured to the table or frame 6 at suitable intervals,which have an opensided eye or loop 51 adapted to engage the 'plunger11, put in the open side vto allow the' passage of the draw-head 5.

in order to preventjr the operators from coming in contact with theplunger 11, there may be provided a shield 55, supported by an arm 56from the frame or table 6. The shield 55 may be provided at intervalswhere' the operators will be employed. or continuously along the side ofthe table, andthe supports 51 and the shield 55 may be combined inacontinuous device, iidesired. A

When the machine is used for drawing rods,

the mandrel 32 is of course dispensed with; but aside from this theoperation of the machine is substantially the same.

VJ hat l claim as new, and desire to secure by Letters Patent, is

1. in a drawing-machine of the character described, the combination oftwo cylinders spaced apart and closed at one end, plungers for thecylinders arranged to be projected out of the unclosed ends of thecylinders and coupled together by a draw-head, a die-holder befater itis removed the pressure is cutV For this purpose there may be pro- IIO-tween the cylinders at the end from which the l plungers are projected,a die arranged to re-l ceive material at the side toward the closed endsof the cylinders, and deliver it at the other side, and tongs mounted onsaid drawhead facing the die and arranged to grasp and draw the materialthrough the die on the thrust or projecting movement of the plungers,substantially as set forth.

2. in a drawing-machine of the character described, the combination of acylinder closed l lll at one end, n plunger lor the cylinder arranged tohe projected from the nnclosed end ot' the cylinder, n die Supportedadjacent to the nnclesed end ot' the cylinder ont of which the plungeris projected, and arranged to receive material from the eide toward theclosed end ot' the cylinder, and deliver it from the other side, tongesecured to the projecting end of the plunger facing -find adapted to hehronglr into close proximity to the die, :md arranged to grip thenriterinl automatically with the tliruet or outward mot-ion of thepinng'er, substantially as set forth.

3. ln n drnwing- Auchine of the elixir-meter described the conrbinaitiimof :i lpnir or' pnrnllel cyiinders spaced apart and closed et one end.end arranged in the sanne horizontal plane in a traine, plnngers in thecylinders adapted to he projected troni the nnclosed end of thecylinders, a drnwdiead coupling together the plnngers a delivery-tableon the frame extending from the cylinders parallel with the linc cimovement ot' the plungers, and over which the draw-head operates, a diesupported between the cylinders and at the end of the table, and tong-sniountedon the draw-head facing the die and arranged to roxiniity thedie when the lunfrers are he brought into close withdrawn into thecylinders, substantially as set forth. i

4. in :i drawing-machine ofthe character described, the combination ofzi pair of parallel cylinders spaced apart and closed at one end, andarranged in the saine horizontal nlnne in :1 frame, zi receiving tank ortzihle arranged in the space between the cylinders` plnngers inthecylinders respectively adapted to he projccted coupling together thephxngers, a. die supported at the ends oi' the cylinders from which theplunger-.5` are projected7 :ind zi tongs mountcd on the draw-head facingthe die and arranged to be brought into close proximity to the die whenthe plungers are withdrawn int-0 the cylinders, und means for returningthe plungers into the from the uncloscd ends, n drnw-head cylinders'-nnd the tongs to their position adjacent to the die, substantially asset forth.

in witness whereof l have affixed mysignature, in presence of twowitnesses, this 15th day of July, 1903.

LESTER C. SMTH.

